OdbcCommand-and-OdbcParameter


            <%@ Page Language="C#" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.Odbc" %>

    void Page_Load(object sender, EventArgs e) {
        if (!Page.IsPostBack)
        {
            OdbcConnection myConnection = new OdbcConnection(@"driver={MySQL ODBC 3.51 Driver};server=localhost;database=books;uid=user;pwd=letmein;");
    
            try{
                string CommandTextPublisher = "SELECT PublisherID, PublisherName FROM Publisher";
                OdbcCommand myCommandPublishers = new OdbcCommand(CommandTextPublisher, myConnection);
    
                myConnection.Open();
    
                DropDownList1.DataSource = myCommandPublishers.ExecuteReader();
                DropDownList1.DataTextField = "PublisherName";
                DropDownList1.DataValueField = "PublisherID";
                DropDownList1.DataBind();
                DropDownList1.Items.Insert(0, new ListItem("-- All Publishers --", "0"));
            } catch (Exception ex){
                throw(ex);
            } finally{
                myConnection.Close();
            }
        }
    }
    
    void ApplyFilter_Click(Object sender, EventArgs e) {
        OdbcConnection myConnection = new OdbcConnection(@"driver={MySQL ODBC 3.51 Driver};server=localhost;database=books;uid=user;pwd=letmein;");
    
        try{
            string CommandTextBooks = "SELECT Book.BookTitle, Publisher.PublisherName FROM Book INNER JOIN Publisher on Book.BookPublisherID = Publisher.PublisherID WHERE ?=0 OR Book.BookPublisherID=? ORDER BY Book.BookTitle";
            OdbcCommand myCommandBooks = new OdbcCommand(CommandTextBooks, myConnection);
    
            OdbcParameter myParameter1 = new OdbcParameter();
            myParameter1.ParameterName = "@pub1";
            myParameter1.OdbcType = OdbcType.Int;
            myParameter1.Value = DropDownList1.SelectedValue;
            myCommandBooks.Parameters.Add (myParameter1);
    
            OdbcParameter myParameter2 = new OdbcParameter();
            myParameter2.ParameterName = "@pub2";
            myParameter2.OdbcType = OdbcType.Int;
            myParameter2.Value = DropDownList1.SelectedValue;
            myCommandBooks.Parameters.Add (myParameter2);
    
            myConnection.Open();
    
            DataGrid1.DataSource = myCommandBooks.ExecuteReader();
            DataGrid1.DataBind();
        } catch (Exception ex){
            throw(ex);
        } finally{
            myConnection.Close();
        }
    }





    
        
            Select a Publisher:
ADO Net Database ASP.Net Tutorial
